Microstation V8i SS 10 - Powershell - How to declare a Point3d

$dgn=$objustn.OpenDesignFile('C:\x.dgn')
$objustn.CadInputQueue.SendKeyin('fit all')
$objustn.CadInputQueue.SendDataPoint <<variablePoint3d>> #void SendDataPoint (Point3d, Variant, int)

 how to declare a Point3d variable named "VariablePoint3d" and assign x,y,z values to this in PowerShell.